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<table width="100%" summary="page for O.mykiss"><tr><td>O.mykiss</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Test data from a 21 day fish test</h2>

<h3>Description</h3>

<p>Test data from a 21 day fish test following the guidelines OECD GL204, 
using the test organism Rainbow trout <em>Oncorhynchus mykiss</em>.
</p>


<h3>Usage</h3>

<pre>data(O.mykiss)</pre>


<h3>Format</h3>

<p>A data frame with 70 observations on the following 2 variables.
</p>

<dl>
<dt><code>conc</code></dt><dd><p>a numeric vector of concentrations (mg/l)</p>
</dd>
<dt><code>weight</code></dt><dd><p>a numeric vector of wet weights (g)</p>
</dd>
</dl>



<h3>Details</h3>

<p>Weights are measured after 28 days.
</p>


<h3>Source</h3>

<p>Organisation for Economic Co-operation and Development (OECD) (2006)
<em>CURRENT APPROACHES IN THE STATISTICAL ANALYSIS OF ECOTOXICITY DATA: A GUIDANCE TO APPLICATION - ANNEXES</em>,
Paris (p. 65).
</p>


<h3>References</h3>

<p>Organisation for Economic Co-operation and Development (OECD) (2006)
<em>CURRENT APPROACHES IN THE STATISTICAL ANALYSIS OF ECOTOXICITY DATA: A GUIDANCE TO APPLICATION - ANNEXES</em>,
Paris (pp. 80&ndash;85).
</p>


<h3>Examples</h3>

<pre>

head(O.mykiss)

## Fitting exponential model
O.mykiss.m1 &lt;- drm(weight ~ conc, data = O.mykiss, fct = EXD.2(), na.action = na.omit)
modelFit(O.mykiss.m1)
summary(O.mykiss.m1)

## Fitting same model with transform-both-sides approach
O.mykiss.m2 &lt;- boxcox(O.mykiss.m1 , method = "anova")
summary(O.mykiss.m2)
# no need for a transformation

## Plotting the fit
plot(O.mykiss.m1, type = "all", xlim = c(0, 500), ylim = c(0,4),
xlab = "Concentration (mg/l)", ylab = "Weight (g)", broken = TRUE)

</pre>


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